fix(Amplitude): user id

android/sdk/src/main/java/org/jitsi/meet/sdk/AmplitudeModule.java

         Amplitude.getInstance(instanceName).initialize(getCurrentActivity(), apiKey);
     }
 
+    /**
+     * Sets the user ID for an Amplitude instance.
+     *
+     * @param instanceName The name of the Amplitude instance.
+     * @param userId The new value for the user ID.
+     */
+    @ReactMethod
+    public void setUserId(String instanceName, String userId) {
+            Amplitude.getInstance(instanceName).setUserId(userId);
+    }
+
     /**
      * Sets the user properties for an Amplitude instance.
      *

ios/sdk/src/analytics/AmplitudeModule.m

     [[Amplitude instanceWithName:instanceName] initializeApiKey:apiKey];
 }
 
+RCT_EXPORT_METHOD(setUserId:(NSString*)instanceName userId: (NSString *) userId) {
+    [[Amplitude instanceWithName:instanceName] setUserId:userId];
+}
+
 RCT_EXPORT_METHOD(setUserProperties:(NSString*)instanceName userPropsString:(NSDictionary*)userProps) {
     if (userProps != nil) {
         [[Amplitude instanceWithName:instanceName] setUserProperties:userProps];

react/features/analytics/handlers/AmplitudeHandler.js

     constructor(options) {
         super();
 
-        const { amplitudeAPPKey, host } = options;
+        const { amplitudeAPPKey, host, user } = options;
 
         if (!amplitudeAPPKey) {
             throw new Error('Failed to initialize Amplitude handler, no APP key');
         };
 
         amplitude.getInstance(this._amplitudeOptions).init(amplitudeAPPKey);
+
+        if (user) {
+            amplitude.getInstance(this._amplitudeOptions).setUserId(user);
+        }
     }
 
     /**

react/features/analytics/handlers/amplitude/Amplitude.native.js

         AmplitudeNative.init(this._instanceName, apiKey);
     }
 
+    /**
+     * Sets an identifier for the current user.
+     *
+     * @param {string} userId - The new user id.
+     * @returns {void}
+     */
+    setUserId(userId) {
+        AmplitudeNative.setUserId(this._instanceName, userId);
+    }
+
     /**
      * Sets user properties for the current user.
      *